Psychological distance refers to the extent that an individual has removed themselves from involvement with others. So a psychological distant person is rather cold and remote rather than warm and friendly.
I do not know why it is not part of the cultural web: the cultural web is not my theory. I suppose power relations + symbols and titles sort of cover it.
A job specification related to what teh job is eg preparing budgets. A person specification related to the person who could do that job eg someone with 2 years experience in a similar role or a part-qualified accountant.